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See Chinese contents: YB/T 4623-2017 YB/T 4623-2017: Cold-Formed Section Steel for Automobile Frame
This Standard specifies the terms and definitions, order content, dimensions, shape, weight and allowable deviation, technical requirements, test methods, inspection rules, packaging, marks and quality certificates of cold-formed section steel for automobile frame. This Standard is applicable to the cold-formed section steel for automobile frame (hereinafter referred to as section steel) produced by hot-rolled steel plates or steel strips with a thickness of no less than 4mm through a continuous roll-bending cold-bending forming unit for passenger and freight vehicles.
